1. In this way, students can help to keep the online environment open and friendly.
    此外，学生在答题之前有时间对所给的信息进行思考，这就使得网上环境开放而友好。

2. In a positive online environment, students feel valued by the instructor, by their classmates and by their own work.
    6. 三思而后答。

3. In fact, twins are more alike than clones would be, since they have at least shared the same environment within the mother, are usually raised in the same family, and so forth.
    事实上，双胞胎相像的程度胜于克隆人，因为他们至少在母体内分享过相同的环境，通常也在同一个家庭里被抚养长大，等等。

4. It seems experts are as divided as ever over the issue of which is more important, environment or genetics.
    哪个更重要，环境还是遗传？对这个问题似乎专家们一向都有分歧。